If someone finds a new copper field, or discovers a better way of producing wheat or steel, these increases in supply of goods confer a social benefit.
如果某人发现了一处新铜矿，或发现了更理想的方法去生产小麦或者钢铁，这些商品产量的增加会使整个社会受益。
Whenever there's a Nick or hairline crack in an insulation sheath, the electrical field in the underlying copper subtly shifts.
在绝缘套上只要出现缺口或者毛细裂缝，线缆里的铜周围的电场就会轻微改变。
The machine's electrified copper coils generate a weak magnetic field, causing the helium atoms to rotate.
机器为铜线圈充电，形成一个弱磁场，使得氦原子旋转。
Sibaysk opencast mine is a Russian copper-zinc pyrite field.
sibaysk露天煤矿是一个俄罗斯的铜-锌黄铁矿。
An electromagnetic field generated by copper coils will pull airborne particles in the smog to the ground where they can be easily cleaned.
通过铜线圈制造的电磁场可以将漂浮于烟尘中的颗粒物吸附到地面上，很轻易的被清理干净。
In the field operation, can cause annealed wire diameter necked, surface scratch, red copper wire, copper wire color, copper wire oxidation and so on some phenomenon.
在现场操作中，会造成退火后线径变细、表面划伤、铜线发红、铜线变色、铜线氧化等一些现象。
Using copper alloy mould to make the small-sized and thin wall ductile iron castings is a new technology in the foundry field.
采用铜合金金属型生产小型薄壁球墨铸铁件是铸造领域一项新技术。
Copper plating technology is widely applied to the field of electronic materials manufacturing for the good electrical conductibility, heat conductivity and ductility of copper deposit.
电镀铜层具有良好的导电、导热、延展性等优点，因此，电镀铜技术被广泛应用于电子材料制造领域。
A numerical model for simulating the temperature field of titanium melted in induction furnace with a water cooled copper crucible has been developed by using the direct finite difference method.
利用直接差分法，建立了水冷铜坩埚感应熔炼过程温度场数值模拟计算模型。
This electromagnetic field would induce electrical currents in the copper.
这个电磁场会在铜内感生出电流。
A lot of submicro copper particles give a golden scattering light with slight pink hue in the dark field of optical microscope and a greyish red colour in visual observation.
无数的亚显微铜粒在暗场显微镜下呈金黄色散射并略带微红色调，肉眼观察则呈灰红色。
The invention belongs to the technical field of catalysis, in particular to a passivation method of a methanol copper catalyst.
本发明属于催化技术领域，具体涉及一种甲醇铜催化剂的钝化方法。
The invention belongs to the technical field of microelectronics, and in particular discloses a method for etching copper.
本发明属于微电子技术领域，具体公开了一种刻蚀铜的方法。
Sculpture manufacturing and field engineering in various materials of our company are as follows: stainless steel, forge copper, cast copper, gild, resin, stone and sandstone.
公司承接各类不锈钢、锻铜、铸铜、贴金工艺、树脂、石材、砂岩等材质的雕塑制作及安装工程。
The invention relates to a solid copper alloy bearing cage mold casting produced by centrifugal casting, and belongs to the machining field.
本发明涉及一种离心铸造生产实体铜合金轴承保持架成型铸件，属于机械加工领域。
The trend of regional geochemical field shows that the area is characterized by tungsten, gold, copper mineralization.
区域地球化学场趋势显示了该区为钨、金、铜矿化集中区的特征。
The invention relates to a production method of natural mottled copper products, belonging to the technical field of metallic material processing.
本发明涉及一种天然斑铜产品的生产方法，属金属材料加工技术领域。
The preparation of nano-copper powders by chemical reduction were studied under ultrasonic field in the solution.
对超声场辅助增强作用下的液相化学还原法制备纳米级铜粉的工艺过程和条件进行了研究。
May circle the system in the vacuum tubular resistance furnace body installment by the multi-layered copper pipe the horizontal field winding, must let water through cooling.
可在真空管式电阻炉体安装由多层铜管绕制的横磁线圈，需通水冷却。
The invention relates to the technical field of the manufacturing of the pipelines of an air conditioning system and particularly discloses a method for expanding a copper pipe.
本发明涉及空调系统管路制造技术领域，且特别公开了一种铜管的胀管方法。
Recent years' geological exploration has confirmed that the proved copper reserves in Dabaoshan copper(silver) polymetallic ore field has reached middle scale.
云南维西大宝山铜（银）多金属矿区通过近年的地质勘查，探明的铜资源量已达中型规模。
The effect of electric field on the recrystallization and recrystallization texture development in cold-rolled copper was studied by X-ray diffraction (ODF analysis) combined with optical microscopy.
利用X射线衍射技术并结合金相组织观察和显微硬度实验，研究了冷轧工业纯钢在电场作用下的再结晶及织构演变规律。
The several decades excavation and study on the copper mining and smelting sites in Wadi Arabah led by Beno Rothenberg had obtained great achievement in the field of archaeometallurgy.
前言：由奔诺·罗森伯格领导的对“阿拉伯谷地”古铜矿冶遗址持续几十年的发掘和研究，在冶金考古方面取得了巨大的成就。
Laboratory and field experiments showed that high molecular organic acid ligation basic copper sulfate is a better fungicide, and is safe to most crops.
通过室内和田间试验，高分子有机酸复合碱式铜具有较好的杀菌效果，对作物的安全性明显提高。
However, the speed of the rotor rotation speed did not change the high magnetic field, or magnetic line of force will not be able to cut the copper.
不过此转子转动速度没有磁场变换之速度高，否则磁力线将不能为铜棒所切割。
We have English composition every week. We read Charles Dickens's "David Copper field" as our text.
我们每星期有英文作文，我们读狄更司的《大卫哥伯非尔》，作为课本。
The types, performance and applied field of copper-clad steel wires were introduced.
介绍了铜包钢线材的类型、性能、应用领域以及生产方法。
Chengmenshan copper deposit, located in the southeastern part of JiuRui copper-polymetallic mineralization concentration field, is a typical stratabound massive sulfide copper deposit.
城门山铜矿床位处九瑞铜多金属矿集区南东端，是典型的层控块状硫化物型铜矿床。
The distributed heat source is first calculated by a tight coupled field-circuit method, including eddy current loss, iron loss and copper loss.
首先用场路紧密耦合方法分析电机的分布热源，包括涡流损耗、铁损和铜损。
The distributed heat source is first calculated by a tight coupled field-circuit method, including eddy current loss, iron loss and copper loss.
首先用场路紧密耦合方法分析电机的分布热源，包括涡流损耗、铁损和铜损。
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